Paper bottle



March 19, 1935.

R. LEIBFARTH PAPER BOTTLE Filed, Oct. 2, 1930 Java/glaz- WAQ ML A [1. o rn e3 Patented Mar. 19, 1935 l,995,2l

warren STATS PAPER BOTTLE Reinhold Lelbfarth, Metzingen-Wurttemberg,

' Germany Application October 2, 1930, Serial No. 485,887

' In Germany February 28, 1930 3 Claims. (Cl. 2295.6)

This invention relates to paper bottles and more view of the upper part of the bottle and closure especially to a novel closure for paper bottles shown in'Fig'. 1. as well as to a novel paste or glue to be used in In the drawing a designates the paper wall of connection with the several layers or parts of the bottle in condition of being closed by pressing 5 paper or similar material of which the paper bottle the rim of the mouth of the bottle together so as 5 is composed. My present invention comprises furto give a fiat conical conformation to the entire ther improvements of the bottle or container dewall of the bottle. The wall a of the bottle is scribed in my co-pending application for U. S. composed of several layers of water-proof paper, Patent Serial No. 442,384, filed April 7, 1930. said layers having been united with each other by According to my present invention I provide means of a paste orglue in the form of the aforelo a special closure for paper bottles, especially for mentioned novel binding and re-inforcing subthe purpose of being suitable for use as a recepstance. The bottom I) of the bottle is preferably tacle for nutriments and the like. More particuinwardly arched and fastened to the under rim of larly, the closure forming part of my present inthe wall of the bottle likewise by the aid of said vention is especially designed to be used inconnecpaste or glue. The inwardly arched form of the 15 tion with paper bottles of fiat conical conformabottom b, as indicated at d, will have the effect tion. a that the weight of the liquid contained in the In addition to the novelclosure I provide a bottle will exert a proper pressure upon said botnovel glue or paste adapted to serve as a. binding tom so that the latter with its downwardly bent or re-inforcing substance for properly uniting the rim will be firmly pressed against the interior 20 several layers of which the wall of the bottle is periphery of the under portion of the wall of the composed as well as for fastening the bottom to bottle. At the upper end, that is to say, at the the walls of a. paper bottle. mouth of the bottle the rim of the wall is pressed The closure is so constructed according to my together after the contents have been filled-in,

invention that it will provide the greatest degree so that the two parts of said rim e and ,1 will be 25 of safety against accidental or malicious opening positioned flat one upon the other. The so comof the bottle. In addition to this, my novel closure pressed fiat upper or mouth portion of the bottle is particularly designed for the purpose of premay now be folded together and the aforemenventing withdrawal of the contents of the bottle tioned seal or closure proper placed upon the foldin that the closure, after being once opened, caned portion and the seal or closure may now be ap- 30 not be again closed without indicating the fact of plied so as to grip in the form of a U around both previous opening. outer surfaces of the mouth portion in flat com- An essential feature of my novel closure conpressed condition. The depression h which serves sists in that it is made in the form of a seal of for fastening the seal or closure 9 to the closed sheet metal applied to the rim of the mouth of the mouth of the bottle is of proper depth permitting 35 bottle, after having said rim pressed flat, said seal penetration of said depressions into the outer surafter being applied to said rim presenting an esfaces of the folded portions of the mouth of the sentially U-shaped cross-section. After being apbottle. The depressions or impressions h, for plied in this manner to the rim of the bottle this instance, may be made in the form of a wave 40 seal is preferably provided with depressions which (curve) which runs in longitudinal direction along 40 penetrate into the compressed rim of the bottle. the seal or closure g, as indicated in Fig. 1 and Preferably, in the present case said depressions an abbreviated designation Mo-which means are of a conformation to prevent lateral displace- Monday-may likewise be impressed into said seal ment of the seal or closure with respect to the or closure. Evidently, the wave-shaped conforcompressed rim of the bottle, a wave shaped or mation of the depression will essentially serve to 45 curved conformation being preferably given for prevent any lateral displacement of the seal or this purpose to said depressions. In addition to closure 9 upon the compressed rim of the month this the depressions on the seal or closure may of the bottle. include for instance a depressed inscription such My novel closure may be very conveniently and as the week day or day of a month on which the easily applied to the paper bottle after having in- 50 closure had been applied to the bottle. troduced the contents and will most successfully In the accompanying drawing Fig. 1 is an elemeet all requirements of a practical closure for vation of my new paper bottle showing in particupaper bottles of the present kind. A paper bottle lar the novel closure provided at the compressed provided with the novel closure according to my mouth of the bottle, and Fig. 2 a partial lateral present invention the further advantage that 55 the bottles may be most conveniently packed in pairs by placing one bottle in opposite direction to another which is of especial importance with respect to utilizing a given space of a bps A further novel feature ofmy present invention, as above mentioned, consists in providing an eilicient binding and re-inforcing glue or paste for suitably uniting with each. other the several layers of which the wall of the bottle is composed as well as for fastening the bottom to the under edge of the wall of the bottle.

The novel glue or paste which I use according to my present invention for uniting with each other the several layers of which the wall of the bottle is composed as well as for fastening the bottom to the under edge of the wall of the bottle is composed essentially of acid-free casein, albumen and sugar. The constituents may for instance be mixed in the following proportions:

1 kg. of casein, 30 g. of crystalline borax (borate of soda), com. of ammonium chloride, 135 g. of pulverized white sugar, and water.

The process of making my new glue or paste is carried out as follows:

1 kg. acid-free neutral casein, is mixed with 30 g. of crystalline borax and placed into a container of. aluminum. Cold water is now added to the mixture and at the same time the latter is continuously kneaded. Thereupon 4 l. of cold water is added and subsequently 4 l. of warm water having a temperature of about C. and 55 com. of ammonium chloride are added under constant stirring of the mixture. Finally the white of an egg and thereupon g. of pulverized sugar are added and the mass well stirred.

In this manner a permanent and durable glue or paste will be obtained which is most suitable for the present purpose and does not produce any bubbles or foam during working of the mass by machine means, said glue or paste having the further valuable property of not exerting any injurious eflect upon the contents in the bottle. Furthermore, the glue or pasteso obtained is insoluble in water and absolutely free from odor. As regards the special mode of applying my new glue or paste to the paper wall of the bottle it may be remarked that it may be applied either manually, for instance by means of a brush, or also by machine means.

If after some longer time of standing the glue or paste should become viscous, it may be diluted with luke-warm water to diminish the viscosity. The glue or paste moreover, will become effective with respect to its binding property upon the several layers of paper to be re-inforced and imited with each other after properly heating the same.

The tools or implements, such as mandrels, sleeves, stamps or the like, which are used for making the paper bottle, are properly heated for the purpose of rendering the glue or paste effective.

While I have herein described a preferred form which my invention may take, it should be understood that it is not necessary that the depression formed in the seal be in the shape of a smooth curveor wave, because obviously certain of the advantages of the invention may also be secured with any other non-straight form of depression, the expression "crooked being employed in the claims as a generic term designating such nonstraight shape and being broad enough to cover smooth curves or waves, as well as'other forms of depressions.

I claim: p

1. A closure for paper bottles adapted to hold liquids, said closurecomprising the collapsed rim portion of the bottle neck and a U-shaped metallic clip having at least one end open, and having therein a longitudinal bead-like impression terminating at the open end and impressed within the material of the paper, for securing it thereover in non-slidable interlocking relation, said bead being longitudinally crooked.

2. A closure for paper bottles adapted to hold liquids, said closure comprising the collapsed and folded-over rim portion of the bottle neck and a U-shaped metallic clip having at least one end open, and having therein a longitudinal beadlike impression terminating at the open end and imressed within the material of the paper, for securing it thereover in non-slidable interlocking relation, said bead being longitudinally crooked.

3. A closure for paper bottles adapted to hold liquids, said closure comprising the collapsed and folded-over rim portion of the bottle neck and a U-shaped metallic clip having at least one and open, and having therein a longitudinal beadlike impression terminating at the open end and impressed within the material of the paper, for securing it thereover in non-slidable interlocking relation, said bead being longitudinally undulating. 

